280 THE CANADIAN ENTOMOLOGIST. 



median vitta, spot near the oral margin each side of the middle, 

 and the narrow lateral margins, whitish pruinose ; front slightly 

 polished, the broad lateral margins, except on their lower part, 

 thinly gray pruinose ; body polished, two vittae on the mesonotum, 

 scutellum and front part of pleura thinly gray pruinose ; wings 

 tinged with yellow. Length, 3 mm. Lake Worth, Fla. (Mrs. A. T. 

 Slosson), and Georgia. Three males and nine females. Type 

 No. 4092 facialis, n. sp. 



Antennal arista white, short plumose, its base yellow ; black, the first 

 two joints of the antenna;, base of the third, halteres, front coxae, 

 front femora and broad apices of the others, all tibise, and the 

 middle and hind tarsi except their apices, yellow ; antennae slightly 

 tapering toward the apex, slightly longer than the head, the third 

 joint four times as long as wide ; front and face polished, the latter 

 whitish pruinose near the lower part of each eye ; body polished, 

 mesonotum and scutellum with a strong coppery lustre, thinly 

 brownish pruinose ; wings tinged with yellow. Length, 3.5 mm. 

 Santa Cruz Mts., Cal. A male specimen, collected by Mr. A. 

 Koebele. Type No. 4093 albiseta, n. sp. 



Genus Pachycerina. 



Yellow, an ocellar spot, tip of antennae, the arista, apical half of palpi 

 and three vittse on the mesonotum, black ; antennae almost as long 

 as the head, slightly tapering to the tip, the third joint three and one- 

 half times as long as wide ; front and sides of face polished, middle 

 of face thinly whitish pruinose, body polished, wings hyaline, slightly 

 tinged with yellow. Length, 3.5 mm. St. Augustine, Fla. Two 

 female specimens, collected by Mr. C. W. Johnson. Type No. 

 4094 davipennis, n. sp. 



Genus Trigonometopus. 



Yellow, two vittae on the front, four on the mesonotum, the upper side 

 of the scutellum and the metanotum, brown, antennal arista white, 

 with a very short pubescence ; head subopaque, mesonotum and 

 scutellum opaque, abdomen somewhat polished ; wings hyaline, 

 small and posterior crossveins bordered with brown, two circular 

 brown spots on the last section of the third vein, the outer one 

 almost directly in front of the posterior crossvein. Length, 3.5 mm. 

 Colorado. A female specimen. Type No. 4095 .punctipennis^ n. sp. 



